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Revenue Recognition (Tables) | 3 Months Ended
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Mar. 31, 2019
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue [Table Text Block] | The following table presents revenues disaggregated by product:
|  | Three Months Ended March 31,
(In thousands) |  | 2019 |  | 2018
OPERATING REVENUES |  |  |  |
Natural gas |  | $ | 633,174 |  |  | $ | 412,108 |
Crude oil and condensate |  | — |  |  | 48,722 |
Brokered natural gas |  | — |  |  | 4,950 |
Other |  | 250 |  |  | 1,870 |
Total revenues from contracts with customers |  | 633,424 |  |  | 467,650 |
Gain on derivative instruments |  | 8,257 |  |  | 5,577 |
Total operating revenues |  | $ | 641,681 |  |  | $ | 473,227 |

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045 + Details
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